window.addEventListener("load", function() {
    (function() {
        // short 快捷导航模块
        var arrow_icons = document.querySelectorAll('.arrow-icon');
        // var arrow_icon_uls = document.querySelector('.arr-icon-ul');
        for (var i = 0; i < arrow_icons.length; i++) {
            arrow_icons[i].addEventListener('mouseover', function() {
                this.children[1].style.display = 'block';
            })
            arrow_icons[i].addEventListener('mouseout', function() {
                this.children[1].style.display = 'none';
            })
        }
    }());

    (function() {
        // footer底部模块
        var service_h5s = this.document.querySelectorAll('.service_h5');
        for (var i = 0; i < service_h5s.length; i++) {
            var top = 0.5 - 49 * i + 'px';
            service_h5s[i].style.backgroundPosition = '-236px ' + top;
        }
    }());
})